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[1/3] iio: adc: rockchip_saradc: fix bitmask for channels on SARADCv2

Message ID 20240223-saradcv2-chan-mask-v1-1-84b06a0f623a@theobroma-systems.com (mailing list archive)
State New, archived
Headers show
Series iio: adc: rockchip_saradc: fix bitmasking and remove custom logic for getting reset | expand

Commit Message

Quentin Schulz Feb. 23, 2024, 12:45 p.m. UTC 
From: Quentin Schulz <quentin.schulz@theobroma-systems.com>

The SARADCv2 on RK3588 (the only SoC currently supported that has an
SARADCv2) selects the channel through the channel_sel bitfield which is
the 4 lowest bits, therefore the mask should be GENMASK(3, 0) and not
GENMASK(15, 0).

Fixes: 757953f8ec69 ("iio: adc: rockchip_saradc: Add support for RK3588")
Cc: Quentin Schulz <foss+kernel@0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
---
 drivers/iio/adc/rockchip_saradc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Heiko Stuebner Feb. 23, 2024, 1:40 p.m. UTC | #1 
Am Freitag, 23. Februar 2024, 13:45:21 CET schrieb Quentin Schulz:
> From: Quentin Schulz <quentin.schulz@theobroma-systems.com>
> 
> The SARADCv2 on RK3588 (the only SoC currently supported that has an
> SARADCv2) selects the channel through the channel_sel bitfield which is
> the 4 lowest bits, therefore the mask should be GENMASK(3, 0) and not
> GENMASK(15, 0).
> 
> Fixes: 757953f8ec69 ("iio: adc: rockchip_saradc: Add support for RK3588")
> Cc: Quentin Schulz <foss+kernel@0leil.net>
> Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>

after checking against the TRM

Reviewed-by: Heiko Stuebner <heiko@sntech.de>
diff mbox series

Patch

diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index dd94667a623b..2da8d6f3241a 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -52,7 +52,7 @@ 
 #define SARADC2_START			BIT(4)
 #define SARADC2_SINGLE_MODE		BIT(5)
 
-#define SARADC2_CONV_CHANNELS GENMASK(15, 0)
+#define SARADC2_CONV_CHANNELS GENMASK(3, 0)
 
 struct rockchip_saradc;